Question

What will be the effect on the melting point if the product is a mixture of the ortho- and para- isomers of bromoacetanilide?

-What information will IR spectroscopy provide about a compound?

Answer 1

1. The melting point of the mixture of two product like ortho- and para- isomers of bromoacetanilide will be lower than pure compound. As impurity disturbs the regular pattern of solid states the cause less energy to disturb the regular pattern.

2. IR spectroscopy provide the presence of functional group information in the molecule, as O-H, N-H bonds appear at 3300-3500 cm-1 whereas double bond and triple bonds appear at 1600-1850 cm-1 and 2200-2400 cm-1 respectively.